An Integrative Analysis of the Transcriptome and Proteome of Rice Grain Chalkiness Formation Under High Temperature
文献类型： 外文期刊
作者： Zhao, Shaolu 1 ; Cao, Ruijie 1 ; Sun, Linhe 3 ; Zhuang, Dongying 4 ; Zhong, Min 1 ; Zhao, Fengli 1 ; Jiao, Guiai 1 ; Chen, Pengfei 1 ; Li, Xinwei 1 ; Duan, Yingqing 1 ; Li, Xiaoxue 1 ; Tang, Shaoqing 1 ; Ni, Shen 1 ; Hu, Peisong 1 ; Wei, Xiangjin 1 ;
作者机构： 1.China Natl Rice Res Inst, China Natl Ctr Rice Improvement, State Key Lab Rice Biol, Hangzhou 310006, Peoples R China
2.Jiangsu Coastal Area Inst Agr Sci, Yancheng 224002, Peoples R China
3.Jiangsu Prov & Chinese Acad Sci, Inst Bot, Nanjing 210014, Peoples R China
4.Jiangsu Acad Agr Sci, Xinyang Agr Expt Stn Yancheng City, Yancheng 224049, Peoples R China
5.Chinese Acad Agr Sci, Natl Nanfan Res Inst Sanya, Sanya 572025, Peoples R China
关键词： rice quality; high temperature; starch biosynthesis; transcriptome; proteome
期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）
ISSN： 2223-7747
年卷期： 2024 年 13 卷 23 期
页码：
收录情况： SCI
摘要： Exposure to high temperatures can impair the grain-filling process in rice (Oryza sativa L.), potentially leading to the formation of chalky endosperm, but the molecular regulation mechanism remains largely elusive. Here, we reported that high-temperature (HT) stress (day/night, 35 degrees C/30 degrees C) reduces both the grain-filling rate and grain weight of Ningjing 1 variety compared to normal temperatures (NT, day/night, 28 degrees C/23 degrees C). Grains under HT stress exhibited an opaque, milky-white appearance, alongside significant alterations in starch physicochemical properties. An integrated transcriptomic analysis of grains under HT revealed up-regulation of genes related to defense mechanisms and oxidoreductase activity, while genes involved in sucrose and starch synthesis were down-regulated, and alpha-amylase genes were up-regulated. Proteomic analysis of grains under HT echoed this pattern. These results demonstrate that high temperature during the grain-filling stage significantly increases rice chalkiness by down-regulating genes related to sucrose and starch synthesis, while up-regulating those involved in starch degradation.
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